PENTAX close -up ring K set (with case)

Set of No. 1 (total length 9.5 mm), No. 2 (total length 19mm), No. 3 (28.5mm in total length).In the case of FA50mmF1.4, it is possible to shoot a high magnification up to 1.74 times if the lens is up to 1 + 3 for 1 + 3 for a lens straight or 1.74 times if the lens is turned upside down. * * Cannot be used for IST